--- Jeffrey Sharp <lists_at_subatomix.com> wrote:
> Well, I've finally moved from acquire mode into play mode...
Good for you.
> Backplane is H9278-A: slots 1-3 Q22/CD, slots 4-8 Q22/Q22.
> AAAAAAAAAA BBBBBBBBBB CCCCCCCCCC DDDDDDDDDD
> 1 M8189----(KDF11-BF)------------------------
> 2 M9047----------------
> 3 M9047----------------
> 4 M8067-LB-(MSV11-P)-------------------------
> 5 M7957----(DZV11-M)-------------------------
> 6 M8639-YA-(RQDX1)---------------------------
> 7 M9047---------------- M9047----------------
> 8 M9047---------------- M9047----------------
>
> The memory is in slot 4 because its grant continuity jumpers (W1 and W2)
> are soldered in, which (according to the MSV11-P user's guide) tells me
> it expects a Q22/Q22 slot instead of a Q22/CD slot.
OK. If room is an issue, you can remove the grant jumpers and put
it in slot 2 AFAIK. When you start throwing in lots of peripherals,
you run out of slots fast. A typical machine for me is a CPU, one to
four memory boards (depending on the capacity), at least one disk
controller, at least one floppy controller, plus serial I/O other
than the console. Sometimes, I have interesting things to put in as
well (COMBOARDs, other sync-serial cards, network, etc.) If you have
a lightly or non-integrated CPU and peripherals, a single BA23 gets full
fast (CPU card, BDV11, RL controller, RX controller, RAM, serial, etc.,
etc.)
> Question 1: does the above look OK, or have I got something wrong?
Looks OK, but there's no reason to put the 4 grant cards in the bottom.
Grant cards are for the benefit of the cards behind them.
The RQDX1 should be the bottom most card (not necessarily the bottom
slot, just the last one used). ISTR there's an issue that it doesn't
pass the interrupt chain to the cards below it, but it's been long
enough that I'm not certain that it is so. I just know that it needs
to go last and there's a good reason for it.
If you don't want to move it often, put it in the bottom slot and fill
the slots above it with grant cards.
> Question 2: Should I try it first with just the CPU and memory in, just
> to get a boot prompt on the console?
I tend to do that myself, as a first step.
-ethan
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Received on Wed May 29 2002 - 17:40:22 BST